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प्रश्न
Name three animals which can hear ultrasonic vibrations.
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उत्तर
Certain creatures like dogs, bats, dolphins, and mosquitoes can detect the waves.
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संबंधित प्रश्न
Guess which sound has a higher pitch: guitar or car horn?
Fill in the blank.
We can hear sounds of frequency in the range of _______
| Column A | Column B |
| (a) Vibrations cause | (1) absorb sound |
| (b) A shriller sound is | (2) second |
| (c) Unit of frequency | (3) sound |
| (d) Unit of time period | (4) of high pitch |
| (e) Curtains | (5) hertz |
What type of wave is represented :
(a) by density-distance graph?
(b) by displacement-distance graph?
Are sound waves longitudinal or transverse?
In an experiment, Anhad studies sound waves. He sets up a loudspeaker to produce sound as shown below :
Anhad adjusts the signal to the loudspeaker to give a sound of frequency 200 Hz.
(a) What happens to the air in-between Anhad and the loudspeaker ?
(b) Explain how Anhad receives sound in both ears.
The smoke from the gun barrel is seen 2 second before the explosion is heard. If the speed of sound in air is 350 ms-1, calculate the distance of observer from the gun.
Explain how the principle of echo is used by
The dolphin to locate small fish as its prey.
Number of vibrations produced in one second is ______.
Through which medium sound travels faster, iron or water? Give reason.
